Study Set Content:
part of ray within the xylem
Xylem ray
applied to all tissues outside the cambium including the phloem
bark
consisting of primary and secondary phloem
Inner bark
consisting of cork tissue and cork cambium
Outer bark(periderm)
Laticifers
remain living and have many nuclei
Laticifers resemble vessels, from extensive branched networks of (blank) originating from rows of the meristematic cell.
latex-secreting cells
Specialized cells or ducts that are found in about 20 families of herbaceous and woody flowering plants. Common in the phloem but occur throughout all parts of the plant
Laticifers
a thick fluid that is white, yellow, orange or red in color
Latex
Latex is composed of
gums, proteins, sugars, oils, salts, alkaloidal drugs, enzymes and other substances
Function of latex
aids in closing wounds
most important form of latex with commercial value.
Rubber
They utilized rubber for making balls and containers for hundreds of years
Amazon Indians
The concentration of bundles, combined with the band of sclerenchyma cells beneath the epidermis and the thicker-walled parenchyma cells, they give capacity to
withstand stress
it contributes to increasing stem length
Intercalary meristem
cultivated for their latex
Para rubber trees
what kinds of plants have intercalary meristems
wheat, rice, barley, oats, rye and other grasses
why do palm trees grow large?
parenchyma cells continue to divide and enlarge without a true cambium developing
Monocot fibers are as strong or as durable as most
dicot fibers
All leaves originate as
primordial in buds
Plants had what before modern civilization began to realize that fossil-fuel supplies eventually would be exhausted.
highly efficient form of solar panel that captured sun's energy
